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Simplifying (8r + -3) + -1(7r + 1) = -6 Reorder the terms: (-3 + 8r) + -1(7r + 1) = -6 Remove parenthesis around (-3 + 8r) -3 + 8r + -1(7r + 1) = -6 Reorder the terms: -3 + 8r + -1(1 + 7r) = -6 -3 + 8r + (1 * -1 + 7r * -1) = -6 -3 + 8r + (-1 + -7r) = -6 Reorder the terms: -3 + -1 + 8r + -7r = -6 Combine like terms: -3 + -1 = -4 -4 + 8r + -7r = -6 Combine like terms: 8r + -7r = 1r -4 + 1r = -6 Solving -4 + 1r = -6 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 1r = -6 + 4 Combine like terms: -4 + 4 = 0 0 + 1r = -6 + 4 1r = -6 + 4 Combine like terms: -6 + 4 = -2 1r = -2 Divide each side by '1'. r = -2 Simplifying r = -2
| X*(2x+1)=78 | | 2=3a-6+8 | | s-3=5-s | | 12=m+4 | | x+8-6=6 | | -5(d+3)=7d+5 | | 16.2=4.2t+1.5 | | 14-(6x-5)=5(2x-1)-4x | | 3.5*7= | | 9x+2y=18 | | 8x-3(x-1)=4(x+2) | | 4r+11=5r | | 75*25= | | 9y-5-3y=4(y+1)-5 | | x+2+3x=18 | | 6x-2y=3 | | 121212=4v | | (-1.39)(-0.3)= | | 9x-4=41 | | 8(2n-5)=4n+8 | | -14p=6p+10 | | 5A+B= | | 9-.5(x-6)=15 | | -77+r=-43 | | -188-(179.4)= | | 4(1.2-.3x)=5.4 | | 4a+5b-10= | | .75x+1.5=4.25 | | 3x-1=5x+11 | | 5(x+2)-3(x-1)=-27 | | X(2x+1)=78 | | -10+2d=9 |